Concave for h u lling-cylinders



(No Model.)

W. R. FEE. GONOAVE FOR HULLING CYLINDERS;

No. 404,037. Patented May 28, 1889.

INVENTOR fiflm 1% ii Milan/r11 fim KM.

fix/mm UNITED STATES PATENT OFFICE.

WILLIAM R. FEE, OF CINCINNATI, OHIO, ASSIGNOR TO THE NATIONAL COT- TON SEED OIL AND HULLER COMPANY, OF MEMPHIS, TENNESSEE.

CONCAVE FOR HULLlNG-CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 404,037, dated May 28, 1889.

Application filed April 11, 1887. Serial No. 234,362. (No model.)

To aZZ whom it may concern.-

Be it known that 1, WILLIAM R. FEE, of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Concaves for Hulling- Cylinders, which improvement is fully set forth in the following specification and accompanying drawings, in which- Figure 1 is a transverse section of a cylinder and two sections of my improved concave in working position with the cylinder of a hull'er. Fig. 2 is a perspective view of one of the sections or staves of the concave.

The object of my invention is to construct a concave for hulling-machines of reversible staves having grinding-ribs upon each face, thus enabling the manufacturer to make a true casting that will require no grinding or fitting, and also providing the user with practically two concaves at the cost of one, all of which will now be set forth in detail.

In the accompanying drawings, A represents one end of the cylinder-housing, and B the revolving cylinder of that class of machines knownas cotton-seed hullers, provided with the customary ribs, C. The concaves or staves D are formed alike on both faces, which are of the same arc or circle as the end housings, A, upon which the said sections are secured. From each face of the sections D project two or more ribs, E. These may extend the entire length of the piece D, or terminate at points near the end, as seen in Fig. 2.

Heretofore in the manufacture of concaves where the ribs were made integral with the body the ribs were formed only upon one side of the concave, while the opposite 'side was provided with a strengthening-rib, making the opposite sides of the castings unlike each other, so that in casting the concaves the inequality of the material caused an unequal shrinkage, warping the parts, and requiring considerable grinding to fit them to the machine. By having both sides alike the staves in cooling will shrink uniformly and produce a perfectly-straight article.

Another feature of great importance in this double construction of a holler-stave is the fact that the action of cotton-seed, particularly upon the ribs of the concave, is so severe that in practice it is found that at least two sets of staves should be furnished with each machine. WVhen the staves are made in the manner above set forth, each machine will have a double set Without entailing the extra cost, it being only necessary when the ribs first used are worn to reverse the staves or turn them over, as the case may be.

Vhat I claim is- 1. A stave for the concave of hulling-machines, consisting of the part D, concave upon both sides and having the ribs E projecting from the concave parts upon opposite sides.

2. The combination, in a hulling-machine, of the hulling-cylinder, the end housings, A, and the staves D, said staves being concaved upon both faces and having the integral ribs E projecting from the opposite concaves and secured upon the housings, substantially as hereinbefore set forth.

3. The staves D for hulling-cylinders, concave upon both faces and having the ribs E arranged opposite each other upon both 0011- cave surfaces, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, this 21st day of December, 1886, in the presence of witnesses.

WILLIAM R. FEE.

WVitnesses:

J. S. ZERBE, HENRY J. HARROP. 

